Sparking plug.



110.834.179.- l n PATENTBD 001231906.

D.W.w1LsoN. l SPARKING PLUG. y AAAAAAAAA ont rrrrrr 1:13.16. 1904.

HHHHHHHHHHHHHHHHHHHH M UNITED STATES. PATENr orales.

Dimm. 'WALKER WILSON.' or. NEW BEDFORD, MAssAcHt-ssrrs. i i .sPnKlNG PLUG.. j

. Nasgi'ze.

'.To may'sojtcermf i Be i. own that I, DANIEL WALKER-WIL- SON, a *citizen of'th'Unitedl States, residin two electrodes being opening 14. The core is placed in the casing,

-silver orfother suitable material.

at New'Bedford,in the countyr o f Bristol an State of Massachusetts, have in 'vented new and useful Improvements in Sparking Plugs, of which the following aspeciiication. i'

This invention relates to certain rnew 'and useful improvementsl in sparking jplulus'ed primarily in gas or gasolene enginecy ders and is of the t e wherein afs'ucces'sion'oi sparks are formeyd) at the inner'end ofthe .plug to make the ignition vof the gases more certam to create ex lesions.

The object of t e invention is to provide in.

a spark-plu an electrode extending from a l core of ation to coperate with a second electrode exten tion of my impl'ovedsparking plug applied to a cylinder. g. 2 1s a perspective view of the same looking from the inside.

1 represents -a cylinder; 2, the piston; 3, my improved sparker. f

-Theplug consists of a casing'4.. of an preferred pattern and construction, forme at its inner end with threads 5, which engage threads 6 in the' end of the cylinder 1. vlA shoulder 7 -is forined in the c 4, vand at -the outer end of the latter itis e karged and threaded, as at 8, to 4receive the thre'a edportion 9 of anut 10. A core 11, of any insulating material,- is ttedin the casing 4, and it is formed .with flanges 12 and 13 and a central ange 12 abuttingv amst the shoulder 7. The nut 10 is screw against the flange 13, thus rigidl holdingthe corewithmthecasing. vAs m e14is .assed throughthe opening 14am is firmly eldin l positionby the threads 16 and a linger-nut 18. On the inner end of the spindle is ormed a tip or electrode 19, of lplatinum or German Embedded in the inner end of the core 10 is an electrode 20, (for the urpose of clearness to be hereinafter termed) the first electrode )its free end -being located adjacent to and siigh Specification of Letters Yatent; Application and rmry 16,1904. serial 110.193.837.

opened an into place. and abuts tly spaced from the tip 19. A secratented oct. 23, 190e.

ond electrode 21 is en'ibeddedin the end of' the casing 4 and its inner end 'is vlocated adj a-` cent to and spaced from the first electrode, as

will be readily understood by reference to the drawings.

' The arrangement of the means for fmaking.

and breaking the circuit in theoperation lo the.l piston is illustrated conventionally in Fig. 1, wherein21 is the spindle-contact 22, the casing-contact; 23',the circuit-wires; 24, the battery; 25, the cam operated by the piston, and 26 the brush to contact with the cam and close the circuit.

As the lpiston reciprocates the circuit is closed, ca a spark to jum from the electrode 19 to t e front electro( e 20, thence to the second electrode 21, creating two sparks, as-will. .be well understood, the current passing through the -spindle andv electrodes, as indicated by the arrows. The making of two j ump-sparks in such quick succession within the cyhnderis accomplished so rapidly that it createspractically an elongated lame, which makes the ignition more positive, i-n that it a greater volume of as. l g In practice I have vfound that. by placin the gaps at the end of the plug the value o the sparkerismateriallyincreased. Furthervmore, it is essential that the ga s be made in series in the' circuit to cause t e current to jump across the space between the electrodesl to roduce the succession of sparks. l

. fdo not'l desire to be limited to a construction capable of forming two sparks, as it isf evident that the number of gaps may be multiplied hence the number' of sparks increase as may be desired.

What I claim as newis- 1. lA sparking plu consis of a-casing,

a core of insulation t erein, ane ectrode prol )ecting from the core adjacentthe first e ec trode, and an electrode securedin the casing adjacent the other electrodes, all of said electrodes b` arran ed inseries in the circuit. 2.. A spar 'ng p ug comprising a casing, a

ecting from the core, a second qelectrode ro- IOO core. of insulation therein, a spindle passing f throu h the core, .an electrode projecting from t e spindle, an electrode secured to the core ad'acent the s indleeelectrode, and an electro e rojec xnthe casing ad'acent both the Ibther tllegctrodes, all of sai electrodes be'ing arr in series inthe circuit.

IIO

3. Ina sparkingbplug, the combination of 'a shell adapted to to the combustion-cylinder of an engine, an insulatin tube as and for the purpose specified.

4. -A spark-plug adapted to be secured in the cylinder of an explosion-engine and having an inwardly-projecting finger constituting one terminal of an electrical circuit7 an insulated conductor in such plug the inner end of which constitutes another terminal which is adjacent to but separated from the first, and a conductor or metal piece iXedly attached to the insulation and interposed between such terminals or in s uch position as to cause the current to pass therethrough.

5. A spark-plug adapted to be secured in the cylin er of an explosion-engine, ha an Ainsulzited conductor the inner end ci which constitutes a terminal for an electrical circuit, and a metal piece attached to the insulation and rejecting adjacent to such terminal and a apted todivide the space between said terminal and the other terminal for such circuit in the cylinder into distinct gaps.

6. A sparking plug carrying at one end a plurality of electrodes arranged in one line and in series in the circuit and suiciently closely relatedto form a linear succession of jump-sparks in touch with one another.

ln' testimony Whereoi` I have signed my name to this specification in the presence of two subscribing witnesses.

DAN IEL WALKER WILSON.

Witnesses:

CHARLES N. RICHMOND, EDWARD H. FORBES. 

